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Tool wear detector

A tool wear and detector technology, applied in the direction of manufacturing tools, measuring/indicating equipment, metal processing machinery parts, etc., can solve the problems of low accuracy and reliability, and achieve the effect of accurate detection

Inactive Publication Date: 2013-10-16
SHENYANG AIRCRAFT CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the acoustic emission device only judges the wear degree of the tool based on the signal "rising slope and the average voltage of several sampling points before the maximum peak voltage", which has the problem of low accuracy and reliability.

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0031] Tool wear detectors such as figure 1 As shown, it is characterized in that an acoustic emission sensor 4, a preamplifier circuit 5, a signal conditioning circuit 6, a signal processing circuit 7 and a display control circuit 8; the output end of the acoustic emission sensor 4 is connected to the input end of the preamplifier circuit 5 through a cable 9 , the output end of the preamplifier circuit 5 is connected to the input end of the signal conditioning circuit 6 through the signal cable I, the output end of the signal conditioning circuit 6 is connected to the input end of the signal processing circuit 7 through the signal cable 11, and the output end of the signal processing circuit 7 is connected to the display through the serial communication cable 8 input terminals of the control circuit.

[0032] The working process of this case is: when the tool is processing the workpiece, since the acoustic emission signals are mainly concentrated in the mid-frequency band or ...

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PUM

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Abstract

The invention provides a tool wear detector which is characterized by comprising an acoustic emission sensor, a pre-amplifying circuit, a signal conditioning circuit, a signal processing circuit and a display control circuit, wherein the output end of the acoustic emission sensor is connected with the input end of the pre-amplifying circuit, the output end of the pre-amplifying circuit is connected with the input end of the signal conditioning circuit, the output end of the signal conditioning circuit is connected with the input end of the signal processing circuit, and the output end of the signal processing circuit is connected with the input end of the display control circuit. The tool wear detector has the advantages that the acoustic emission characteristics of a tool during the processes from the sharp state to the wear state are recorded and sorted when the tool cuts a workpiece, thereby exactly detecting the wear of the tool.

Description

technical field [0001] The invention relates to a detector for detecting tool wear state during metal cutting based on acoustic emission. Background technique [0002] In the process of metal cutting, it can be used as the source of acoustic signals, including the following: plastic deformation of the workpiece during processing; plastic deformation of cutting; friction between the side of the tool and the workpiece, resulting in side wear; the front surface of the tool and the workpiece. Friction, and the left and right crescent bay wear; the impact of the tool and the cutting; the breaking of the chip; the fracture of the tool, etc. [0003] According to the above analysis of acoustic emission signals in metal processing, acoustic emission includes two different types of signals including continuous signals and transient signals. The continuous signal is accompanied by the entire process of the front and side of the tool from sharpness to wear, and the transient signal wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q17/09
Inventor 聂鹏杜宝瑞陈彦海徐涛王玉周徐洪垚唐臣升李正强
Owner SHENYANG AIRCRAFT CORP